9(a−b)(b−c)(c−a)9(a-b)(b-c)(c-a)9(a−b)(b−c)(c−a)
3(a−b)(b−c)(c−a)3(a-b)(b-c)(c-a)3(a−b)(b−c)(c−a)
2(a−b)(b−c)(c−a)2(a-b)(b-c)(c-a)2(a−b)(b−c)(c−a)
(a−b)(b−c)(c−a)(a-b)(b-c)(c-a)(a−b)(b−c)(c−a)